Pipe-puller.



UNITED STATES Patented August 16, 1904.

JAMES W. WALKER, OF l/VILLOVV, INDIANA.

PIPE-PULLER.

SPECIFICATION forming part of Letters Patent No. 767,782, dated August16, 1904.

Application filed March 21,1903.

To a/ZZ whom it may con/cern."

Be it known that I, JAMES WV. WALKER, a citi- Zen of the United States,residing at Willow, in the county of Hancock, State of Indiana, haveinvented certain new and useful Improvements in Pipe-Fullers; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art'to whichit appertains to make and use the same.

This invention relates to pipe-pullers such as are employed for pullingthe piping of casing from wells, although it will be understood that thepuller may be used for any other speciiic purpose for which it may beadapted.

The object of the invention is to provide an implement of this naturewhich may be inserted and firmly engaged in the pipe to be pulled andwhich will hold securely against working strain, but which may be easilyand quickly disengaged or disconnected.

A further object of the invention is to provide an implement of thisnature which will comprise but few parts, which-may be manufactured at alow price, and which will be durable.

In the drawings forming a portion of this specification, and in whichlike numerals of reference indicate similar parts in the several views,Figure l is a perspective view of the implement with the parts thereofin their inactive ipositions. Fig. 2 is a section taken longitudinallythrough the implement and a section of pipe with which it is engaged.Fig.

portion 5 is rectangular in cross-section and is gradually increased indiameter in a direction away from the body portion 7 by forming thesides of the stem to gradually diverge to the head 6the sides of theextreme end portion of the stem being converged, so that Serial No.148,886. (No model.)

the head 6 is what may be. termed spearshaped.

Through the stem portion 5 of the implement is formed alongitudinally-extending slot 8, through which is passed the key 9, thiskey being adapted for sliding' movement longitudinally of the slot. rlhekey 9 holds the gripping-jaws 10 and 11 to the stem 5. Each of thegripping-jaws consists of a spring-metal plate of elongated shape, andthrough these spring-metal plates at one end are formed openings l2 and13,with which is engaged the key, said key having a head 14 at one endwhich rests against the outer face of one of the jaws, while itsopposite end is passed through the washer 16 and is then riveted toprevent disengagement. The key in question is engaged through thespring-plates at their ends adjacent to the body portion 7, and saidplates are increased gradually in thickness to points adjacent to theiropposite ends and are then tapered to their extremities, the portions ofgreatest thickness having' their outer faces serrated, as illustrated at18. The proportions of the parts are such that when the key 9 is movedto its limit in a direction away from the base 7 the opposite ends ofthe jaws or plates 10 and 11 are moved over the divergent faces of thestem 5 until their extremities extend to the extremity of the stem, itbeing understood that during this movement of the plates or jaws theserrated portions thereof are moved gradually away from each other.

In the use of the puller the jaws are moved iirst in the direction ofthe base 7, so that they may lie in their closest possible relation, andthe end of the stem or the head 6 is inserted in the end of the pipe tobe drawn, the insertion being sufhcient to carry the serrated portionsof the jaws into the pipe, the jaws being held in their retractedpositions by means of the wire or cord 19, which is engaged with the eye20 in the end of one of the jaws. After the puller has been inserted tothe proper degree the wire or cord is released, so that the jaws slidedownwardly of the stem and are expanded, as above described, so as toengage the inner surface of the pi-pe. The stem is then drawn upwardlythrough the medium oil the pipe or other connection with the body 7, thefrictional engagement of the jaws with the interior of the pipe to bedrawn being suicient to hold the jaws against upward movement initially,and as the stem continues upwardly between the jaws the head 6 wedgesbetween the jaws and forces them outwardly, causing them to engage orgrip the pipe with an increased intensity. As the body portion 6 issubjected to further strain suiicient to pull the pipe, slipping isprevented by the increased gripping action of the jaws. When it isdesired to disengage the puller from the pipe, the stem is presseddownwardly between the jaws, the latter being held against movement withthe stem by means of the cord or wire until the jaws release the pipe,when the puller may be readily withdrawn, as may be understood.

What is claimed is- A pipe-puller comprising a body portion having arecess in its outer end and a perforation passing from the bottom of therecess through the body in a direction away from the said recess, a stemportion rectangular in cross-section, the sides of which divergegradually in a direction away from the said body portion, the saiddiverging sides being converged at the extreme end portion of the stemto form a head, the said stem portion having a longitudinal slot passingthrough it, spring-plates disposed slidably against the faces throughwhich the slot is formed, a key passed through the plates and the slotoi' the stem and slidable longitudinally of the latter, an extensionfrom one of theI plates, and means passing through the said recess andthe perforation of the body portion, and connected with the saidextension for shifting the plates longitudinally of the stem.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES W. WALKER. Witnesses:

OWEN M. WALKER, FRED M. HAMMER.

